Sayyiduna Anas bin Malik (may Allah be pleased with him) said: When the Messenger of Allah (peace and blessings be upon him) entered Makkah, there was a helmet on his head. When he took off the helmet, a man came and said: Ibn Khatal is clinging to the covering of the Ka'bah. He said: "Kill him."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجزية / 18780